A red light flashes 3 times per minute and a green light flashes 5 tim – McqOptions

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1.	A red light flashes 3 times per minute and a green light flashes 5 times in two minutes at regular intervals. If both lights start flashing at the same time, how many times do they flash together in each hour?
A.	30
B.	24
C.	20
D.	60
Answer» B. 24

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